<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>chat-many</title>
</head>
<body>
<script>
    var socket;
    if (window.WebSocket) {
        socket = new WebSocket('ws://localhost:9899/ws');
        socket.onmessage = function (ev) {
            var rt = document.getElementById('responseText');
            rt.value = rt.value + '\n' + ev.data;
        }

        socket.onopen = function (ev) { // open
            var rt = document.getElementById('responseText');
            rt.value = '连接开启了...';
        }
        socket.onclose = function (ev) { // close
            var rt = document.getElementById('responseText');
            rt.value = rt.value + '\n' + '连接关闭了...';
        }
    } else {
        alert('当前浏览器不支持webSocket');
    }

    function send(message) {
        if (!window.WebSocket) {
            return;
        }
        if (socket.readyState == window.WebSocket.OPEN) {
            socket.send(message);
        } else {
            alert('连接没有开启');
        }
    }
</script>
<form onsubmit="return false">
    <textarea name="message" style="height: 300px;width: 300px;"></textarea>
    <input type="button" value="发送消息" onclick="send(this.form.message.value)"/>
    <textarea id="responseText" style="height: 300px;width: 300px;"></textarea>
    <input type="button" value="清空内容" onclick="document.getElementById('responseText').value=''"/>
</form>

</body>
</html>